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美国化学界在细砂粘壤土上进行了三年马铃薯栽培试验.供试土壤pH为6.1,每公顷含镁78.7公斤,磷48.8公斤,钾246.4公斤,有机质2.91%.供试品种为卡塔金.播种时分每公顷施硫酸镁45.5公斤和113.5公斤两种处理,播种后24个星期收获,块茎贮于5℃条件下5个月,然后分析化验.化验结果,每公颂施硫酸镁45.5公斤的,马铃薯块茎内每克干物质总氮含量为17—20毫克,游离氨基酸总量增长9%,对照块茎内每克干物质总氮含量为16毫克;每
The U.S. chemical community conducted a three-year potato cultivation experiment on fine sand loamy soil with a soil pH of 6.1, 78.7 kg of magnesium per hectare, 48.8 kg of phosphorus, 246.4 kg of potassium and 2.91% of organic matter. Sowing time 45.5 kg per hectare of magnesium sulfate and 113.5 kg two kinds of treatment, sowing 24 weeks after harvest, tubers stored at 5 ℃ for 5 months, and then analyzed the test results of the test results, the amount of magnesium sulphate per kilogram 45.5 kg , The total nitrogen content per gram of dry matter in potato tubers was 17-20 mg, the total amount of free amino acids increased by 9%, and the total nitrogen content per gram of dry matter in control tubers was 16 mg;